Catalogues - photomultiplier-accessories

Catalogue Photomultiplier Accessories

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introduction

photomultiplier housings

Optimal performance can be obtained by operating the photomultiplier within an appropriately designed housing. A housing offers the following benefits:

• shielding against electromagnetic interference

• reduction of the effects of external magnetic fields

• incorporation of good high frequency techniques to preserve signal waveforms

• stable mounting of the photomultiplier

• provides convenient mounting arrangements

• exchangeable photomultiplier

A photomultiplier housing is a convenient way to achieve reliability of performance.

In addition, measurements can be performed immediately after installation.

" his amahura describes '.'■(: jNiducLs avaikib to sa! up a detection system with minimum effort:

• sockets for mounting purposes and for providing electrical contact to the photo multiplier

• voltage dividers to establish the required electrical operating conditions

• shielding to reduce the effect of external magnetic fields on the performance of the photomultipller

• housings provide a light-tight enclosure, which can include the voltage divider, socket, magnetic shielding, power supply, and signal conditioning electronics

• high voltage power supplies manufacturer

• signal conditioning electronics

basic photomultiplier configurations

The figures below illustrate the basic forms of a detector, figure 1 - illimitée :-e lilic-lornililiplier ■.vi:h socket r-).-:l

voltage divider. The voltage divider may either be wired by the user, or supplied pre-wired from Electron Tubes.

figure 2 - shows the voltage divider board solderai: draaily to a photomultiplier with a flying lead base.

figure 3 - illustrates an integrated module, consisting of a pholomultiplier and voltage divider encapsulated within a metal sleeve.

Cooled housings include all of these features but their principal function is to maintain the photomultiplier at a constant, low temperature to achieve:

• stability of performance unaffected by changes In ambient temperature

• measurement of very weak signals through reduction of photomultiplier background

1 2

the photomultiplier is not a standalone device; mechanical and electrical interfaces are needed